100 Ft 3/8" x 7/8" Pre-Insulated Copper Tubing

100 Ft 3/8" x 7/8" Pre-Insulated Copper Tubing

DABUND 100 ft 3/8" x 7/8" pre-insulated copper tubing is designed for compatible air-conditioning, heat pump, commercial HVAC and refrigeration systems that require an extended refrigerant piping route between indoor and outdoor equipment.

The paired copper tubing combines a 3/8" tube and a 7/8" tube, equivalent to approximately 9.52 mm and 22.23 mm outside diameter. The continuous coil length is 100 ft, approximately 30.48 m.

On compatible HVAC equipment, the 3/8" tube commonly functions as the liquid line while the 7/8" tube functions as the suction or gas line. Final pipe sizing must always follow the exact equipment manufacturer's installation specifications.

High-purity copper tubing is combined with factory-applied white PE insulation for thermal protection and condensation control. ASTM B280 and C12200 copper specifications are available according to the ordered configuration.

Quick Answer: This product is a 100 ft / 30.48 m pre-insulated HVAC copper line set containing 3/8" and 7/8" outside-diameter tubing, approximately 9.52 mm and 22.23 mm, with white PE insulation for compatible long-distance HVACR installations.

Important Long-Line Compatibility Notice: A 100 ft refrigerant run is not suitable for every HVAC system. Before ordering or installation, confirm the required pipe diameters, maximum actual and equivalent piping length, vertical separation, refrigerant charge requirements and insulation specification in the equipment manufacturer's installation manual.

100 Ft 3/8" x 7/8" Copper Tubing Specifications

Key Features of the 3/8" x 7/8" Insulated Copper Tubing

3/8" Liquid Line and 7/8" Suction Line

On compatible HVAC equipment, the smaller 3/8" tube commonly serves as the liquid refrigerant line while the larger 7/8" tube serves as the suction or gas return line.

Their approximate outside diameters are 9.52 mm and 22.23 mm. Because refrigerant pipe requirements vary by equipment design, both dimensions must be verified before installation.

100 Ft Continuous Refrigerant Piping

The 100 ft / 30.48 m coil is designed for compatible installations where indoor and outdoor HVAC equipment require a substantially longer routing distance than standard short line sets.

Where permitted by the equipment manufacturer, one continuous copper coil can reduce the need for intermediate refrigerant-line connections compared with joining several shorter tubing sections.

High-Purity C12200 Copper

High-purity copper provides good formability, thermal conductivity and corrosion resistance for professional HVAC and refrigeration piping applications.

ASTM B280 and C12200 DHP specifications are available according to the ordered configuration. Buyers requiring specific wall thickness, pressure performance or technical documentation should confirm these requirements before production.

Factory-Applied White PE Insulation

Factory-applied white PE insulation helps reduce field preparation while providing thermal protection and condensation control around the refrigerant copper tubing.

Multiple Insulation Thickness Options

Available insulation thicknesses include 8 mm, 9 mm, 10 mm, 13 mm, 19 mm and 25.4 mm according to the selected product and project requirements.

OEM Printing and Private Label

Company name, copper tube size, coil length and other product identification can be printed on the insulation for HVAC distributors, wholesalers and private-label brands.

High-Purity Copper Tubing

White PE Insulation

Protective Plastic Caps

White PE Multi-Layer Insulation

The white PE insulation system uses a multilayer structure designed to help reduce thermal transfer, moisture penetration and mechanical damage during HVAC transport and installation.

Embossed PE Outer Layer

The PE outer layer helps protect the insulation against abrasion and handling damage. UV-resistant configurations are available for installations that include outdoor piping.

IXPE Foam Middle Layer

The foam middle layer helps reduce heat transfer while providing cushioning and moisture resistance around the refrigerant tube.

Closed-Cell Inner Layer

The closed-cell inner structure helps limit water-vapor penetration and supports condensation control on cold refrigerant piping.

Insulation Pipe Production

Insulated Pipe Warehouse

Closed-Cell Inner Insulation

Insulation Performance for Long Refrigerant Runs

Thermal Protection

Insulation helps reduce unwanted heat transfer between the refrigerant tubing and surrounding air. This becomes particularly important on a 100 ft piping run because a longer route creates a larger insulated surface area.

Condensation Control

Closed-cell insulation helps limit moisture penetration and surface condensation. All insulation joints and repaired sections should be properly sealed during installation.

Mechanical Protection

The outer insulation layer helps protect the tubing during shipping, handling and routing through walls, ceilings and mechanical spaces.

UV-Resistant Options

UV-resistant configurations are available where parts of the refrigerant line are exposed outdoors. Additional line-set covers may be required depending on climate and project conditions.

Insulation Testing Options

Available insulation specifications include testing related to ASTM E84, UL 94, ASTM D1056, ASTM G21, ASTM C1427 and UL 723 according to the selected material configuration. Confirm the exact applicable test documentation for the product being ordered.

Why Choose a 100 Ft Refrigerant Line Set?

A 100 ft copper line set is intended for compatible projects where indoor and outdoor equipment are separated by a substantial horizontal or vertical distance.

Typical applications may involve multi-story buildings, rooftop equipment, commercial properties, large mechanical rooms or installation routes that must pass around structural obstacles.

Compared with connecting multiple shorter copper sections, one continuous 100 ft coil can reduce intermediate joints when the equipment manufacturer permits the required piping length.

Important Requirements for a 100 Ft HVAC Refrigerant Run

Verify Maximum Actual Piping Length

Confirm that the exact HVAC equipment permits approximately 100 ft / 30.48 m of actual refrigerant piping. Some systems have substantially shorter maximum line-length limits.

Calculate Equivalent Piping Length

Refrigerant piping design may need to consider equivalent length in addition to physical distance. Bends and other routing conditions can increase the calculated equivalent length.

Check Maximum Vertical Separation

If indoor and outdoor equipment are installed at different elevations, confirm the manufacturer's maximum permitted vertical separation. This is especially important for rooftop and multi-story installations.

Confirm Additional Refrigerant Charge

Many HVAC systems include a factory refrigerant charge for only a specified standard piping length. A 100 ft run may require additional refrigerant according to the manufacturer's charging rate and procedure.

Check Long-Line Installation Requirements

Some equipment manufacturers specify additional requirements for extended refrigerant piping. These requirements may depend on refrigerant type, vertical lift, total equivalent length and system configuration.

Support Long Horizontal and Vertical Runs

A long refrigerant line should be properly supported to reduce sagging, vibration and mechanical stress on the copper tubing and insulation.

Protect Insulation at Wall and Floor Penetrations

Use suitable sleeves, grommets or protective materials where the tubing passes through structural openings to reduce abrasion and insulation damage.

Is 3/8" x 7/8" Suitable for My HVAC System?

A 3/8" x 7/8" refrigerant line set is used on selected higher-capacity air-conditioning, heat pump and refrigeration systems. However, there is no universal tonnage or BTU rule that determines the correct pipe dimensions.

Some higher-capacity equipment may specify a 3/8" liquid line and a 7/8" suction line, while equipment with similar nominal capacity from another manufacturer may use different tubing sizes.

Always verify both refrigerant line diameters against the exact indoor and outdoor equipment combination before ordering.

Applications of 100 Ft 3/8" x 7/8" Copper Tubing

High-Capacity Split Air Conditioning

Suitable for compatible split-system equipment that specifically requires 3/8" and 7/8" refrigerant piping.

Heat Pump Systems

Can be supplied for compatible heat pump installations requiring these tube dimensions and an extended piping route.

Commercial HVAC Installations

The 100 ft configuration is particularly relevant to compatible commercial projects where indoor and outdoor equipment are positioned farther apart.

Multi-Story and Rooftop HVAC Projects

Long coil configurations may be useful where refrigerant piping must travel between different floors or from indoor equipment to rooftop outdoor units, subject to the equipment manufacturer's vertical-lift limitations.

Refrigeration Applications

The tubing can also be supplied for refrigeration applications when copper dimensions, wall thickness, insulation and operating requirements match the system design.

Available Pre-Insulated Copper Tubing Sizes

100 Ft Copper Line Set for HVAC Distributors

DABUND supplies long-length pre-insulated copper tubing to HVAC wholesalers, distributors, importers, contractors, engineering companies and private-label brands.

The 100 ft 3/8" x 7/8" configuration provides a stocking option for buyers serving compatible higher-capacity and extended-distance HVAC installations.

OEM and Custom Insulated Copper Tubing

DABUND supports OEM and ODM production for HVAC distributors, importers and private-label brands.

• Custom copper tube combinations

• Custom coil lengths

• Multiple white PE insulation thicknesses

• Logo and specification printing

• Private-label packaging

• Custom product identification

• Bulk production for distributors and project buyers

Why Choose DABUND Insulated Copper Tubing?

HVAC Manufacturing Experience Since 2008

DABUND has manufactured HVAC components since 2008, supplying insulated copper pipe, mini split line sets and related HVAC products to international customers.

Long-Length Copper Line Set Supply

Multiple coil lengths are available for distributors and project buyers requiring both standard and extended refrigerant piping configurations.

OEM and Private-Label Support

Insulation printing, product identification and packaging can be customized according to distributor and HVAC brand requirements.

DABUND Factory

DABUND manufactures insulated copper pipe, mini split line sets, aluminum pipe and related HVAC components for international B2B customers.

SGS Testing and Insulation Standards

Available insulation configurations include testing related to ASTM E84, UL 94, ASTM D1056 and ASTM G21 according to the selected material specification. Confirm the applicable documentation for the exact product configuration being ordered.

International HVAC Exhibitions

DABUND participates in international HVAC exhibitions to present insulated copper tubing, line sets and related HVAC products to distributors, importers and industry buyers.

Frequently Asked Questions

What is a 100 ft 3/8" x 7/8" insulated copper line set?

It is a paired HVAC refrigerant line set containing 3/8" and 7/8" outside-diameter copper tubing with factory-applied insulation. The total coil length is approximately 100 ft or 30.48 m.

What are the metric sizes of 3/8" and 7/8" copper tubing?

A 3/8" tube has an outside diameter of approximately 9.52 mm, while a 7/8" tube has an outside diameter of approximately 22.23 mm.

Which tube is the liquid line and which is the suction line?

On compatible HVAC equipment, the 3/8" tube commonly serves as the liquid line and the 7/8" tube as the suction or gas line. Always verify the piping diagram for the exact system.

Can every HVAC system use a 100 ft refrigerant line?

No. Maximum refrigerant piping length varies significantly by equipment model. Confirm the manufacturer's maximum actual and equivalent piping length before selecting a 100 ft coil.

What HVAC capacity uses 3/8" x 7/8" tubing?

This pipe combination is used by selected higher-capacity HVAC equipment. Some systems in approximately 72,000–96,000 BTU classes may use these dimensions, but capacity alone should not be used to select refrigerant piping.

Does a 100 ft line require additional refrigerant?

It may. Many HVAC systems include a factory charge for only a specified standard piping length. Follow the equipment manufacturer's instructions to calculate any required additional refrigerant.

Does a 100 ft line require special long-line installation procedures?

Some HVAC equipment has special requirements for extended refrigerant piping. These can depend on total equivalent length, vertical separation, refrigerant type and equipment design. Follow the exact installation manual.

Why is vertical separation important on a 100 ft line?

Large elevation differences between indoor and outdoor units can affect refrigerant and oil circulation. Always stay within the equipment manufacturer's maximum vertical-lift specification.

What insulation is used on this product?

This configuration uses white PE closed-cell insulation designed to provide thermal protection and help control condensation.

What insulation thicknesses are available?

Available thicknesses include 8 mm, 9 mm, 10 mm, 13 mm, 19 mm and 25.4 mm depending on the selected product specification.

Is UV-resistant insulation available?

Yes. UV-resistant insulation configurations are available where parts of the refrigerant piping are installed outdoors.

What pressure rating does the copper tubing have?

Allowable working and test pressure depends on tube diameter, wall thickness, copper specification and ordered configuration. Buyers requiring a specific pressure value should confirm the applicable technical data before ordering.

Can DABUND customize the 100 ft insulated copper tubing?

Yes. OEM and ODM options include tube combinations, coil length, insulation thickness, printed identification and private-label packaging.

Can I get samples before a bulk order?

Yes. DABUND provides sample support for product evaluation. Sample configuration and express shipping arrangements should be confirmed before dispatch.

What payment terms are available?

Available payment methods can include T/T, L/C at sight and credit card. Final terms depend on the commercial agreement.

What delivery terms are available?

Available trade terms can include EXW, FOB, CFR and CIF according to the buyer's logistics requirements.

What is the typical delivery time?

Current product information lists typical delivery at approximately 15–20 days. Actual timing depends on order quantity, specification, customization and production schedule.

Who should install a 100 ft refrigerant line set?

Refrigerant piping, brazing or flare connections, pressure testing, evacuation and refrigerant charging should be completed by qualified HVAC personnel according to local requirements and the equipment manufacturer's instructions.